In Hoon, bunting a mold produces its default/example value (or "bunt value"). For example, the bunt of a null-terminated list is ~ (null, an empty list). The bunt of @ud (an unsigned decimal) is 0. Bunting is done with the kettar rune (^*), or more commonly its irregular form: a * prefix like *@ud, *(list @t), etc.
Further reading
- Kettar rune reference: Details of the kettar rune.
- Hoon School: Molds lesson: This lesson discusses bunt values.